<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>电话拨号盘</title>
    <style>
        td{
            text-align: center;
        }
        .first{
            color: red;
            text-decoration: underline;
        }
        .second{
            color: green;
            text-decoration: line-through;
        }
        .third{
            color: blue;
            font-weight: 900;
        }
    </style>
</head>
<body>
    <table  align="center" border="2" cellpadding="10" cellspacing="0" width="500" heigth="500">
    <tr class="first">
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
    <tr class="second">
        <td>4</td>
        <td>5</td>
        <td>6</td>
    </tr>
    <tr class="third">
        <td>7</td>
        <td>8</td>
        <td>9</td>
    </tr>
    </table>
</body>
</html>